After many hours of debuggin, me and Claude finally got the backport working. (It was stable in my testing of all the recipes, it might have some issues but one of which i could find)
There are 2 versions which this mod works for, Forge 1.20.1 and NeoForge 1.21.1.
Hope this helps everyone that asked for the 1.20.1 version, in hindsight starting the project in 1.20.1 would have been better as more people are on 1.20.1 Forge. Either way its up and running. Both on Modrinth and CurseForge, called KubeJSGUI (second pic).
Any feedback and suggestions are welcome, hope you guys enjoy it, so many people wanted 1.20.1 Forge on the last post.
by TiccBread